Be torn between A and B 表示“陷入两难境地”的意思。
试看下面的翻译：
他在自己对科学的兴趣和对哲学的酷爱之间很难做出选择。
He found it hard to make a choice between the two alternatives: science and philosophy.
He was torn between his interest in science and his strong philosophical bent.
大家看看第二句，感觉是不是第二句更加精炼呢？
再举一些使用些句型翻译的句子：
在合资企业收入较高，但是缺乏稳定性，在国有企业工作相对收入较低，但是具有较高的稳定性，爱丽丝因此陷入了两难境地。
Alice was torn between a job in a joint venture with a higher pay but with less stability and a job in a state-run enterprise with relatively a lower pay but a higher degree of stability.
马克既对社会学感兴趣，又酷爱音乐舞蹈，他很难做出选择。
Mark was torn between his interest in sociology and his strong love for music and dance.
面对两种选择，大多数的人举棋不定。
Facing two choices, most people will find themselves torn between them.
他告诉我，一个女孩很聪明，但是相貌平平，另一个女孩长得漂亮，却只是匮乏，他很难做出选择。
He told me that he was torn between a girl of intelligence with a plain look and a pretty girl who had had little education.
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